Setting a device online or offline
Use the online device group attribute to set a device online or offline.
Procedure
To set a qeth group device online, set the online device
group attribute to
1. To set a qeth group device offline, set the online device
group attribute to 0. Issue a command
of the form:
# echo <flag> > /sys/bus/ccwgroup/drivers/qeth/<device_bus_id>/onlineSetting a device online associates it with an interface name. When you set a device successfully online or offline, a change uevent is created.
Setting a device offline closes this network device. If IPv6 is active, you lose any IPv6 addresses set for this device. After you set the device online, you can restore lost IPv6 addresses only by issuing the ip or an equivalent command again.
Example
To set a qeth device with bus ID 0.0.a100
online issue:
# echo 1 > /sys/bus/ccwgroup/drivers/qeth/0.0.a100/onlineTo set the same device offline issue:
# echo 0 > /sys/bus/ccwgroup/drivers/qeth/0.0.a100/online